SEMI and Global Net Corp. have released a joint report projecting the glass core substrate market could grow at a 67.2% CAGR from 2028 to 2040, signaling a potential shift in advanced semiconductor packaging.
Market context
Glass core substrates are emerging as a next-generation packaging technology to address the physical limits of traditional organic substrates. As AI and high-performance computing drive demand for larger, more complex packages, glass offers superior dimensional stability, finer interconnect pitch, and support for larger package sizes. The report notes that initial production could begin around 2028 in select high-performance applications, with broader adoption following as the technology matures.
Technology drivers and barriers
The primary driver is the industry’s need to improve system performance beyond traditional transistor scaling. Glass core substrates enable tighter interconnect densities and better thermal management, which are critical for advanced processors, co-packaged optics, and image sensors. However, commercialization faces significant hurdles, including glass handling, through-glass via formation, and metallization processes. The report maps a global development ecosystem spanning Asia, North America, and Europe, with companies and research consortia addressing these challenges.
Market outlook and ecosystem
Under the report’s scenarios, adoption will expand over time across larger and more complex package architectures. The 67.2% CAGR reflects a base-case projection averaging positive, base, and negative scenarios through 2040. The analysis covers company activities across substrates, glass materials, equipment, processing, and inspection segments, providing an independent view of market potential and key players.
Strategic significance
This report arrives as semiconductor manufacturers increasingly pivot to advanced packaging as a performance lever. Glass core substrates represent a high-risk, high-reward bet on next-generation interconnect technology. For industry stakeholders, the 2028 timeline offers a clear window for supply chain preparation, while the 67% CAGR underscores the scale of opportunity—if technical barriers can be resolved. The next five years will determine whether glass becomes a mainstream substrate or remains a niche solution for the most demanding applications.
